| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a stamper which prepares an optical recording medium which comprehensively satisfies various kinds of parameters of an LPP signal, a jitter, a PI error, etc. in a plane. <P>SOLUTION: In the stamper having at least wobble grooves and land prepits formed on its surface, land prepits (LPP) 20 are constituted of a meandering part being a part of a wobble groove. In terms of the plurality of wobble grooves formed in the stamper, when comparing lengths Lw in a direction along the wobble grooves of the land prepits 20, the Lw become longer from the inner circumferential section to the outer circumferential section of the stamper (table 1 (not shown)). <P>COPYRIGHT: (C)2009,JPO&INPIT |
